Real-time validation of business emails and phone numbers: syntax, domain, mailbox and catch-all checks for email, and line type, carrier and reachability for phone, in about 300 ms.
Data product · Listing updated 11 Nov 2026
Worldwide, no country restrictions stated.
Median 300 ms per email; 100,000-row batches in under 20 minutes
About 1.1 billion checks a year
Startups, Small and medium businesses, Mid-market, Enterprises
Live SMTP handshakes, DNS lookups, numbering-plan databases and carrier lookups
Real-time checks without sending email; results cached up to 30 days
Stop bounces and fake sign-ups at the point of entry, or clean a list in bulk.
For an email address, the API returns a status (valid, invalid, accept_all or unknown), a sub-status explaining why (for example mailbox full, no MX record, disposable domain or role account), and flags for free-mail and disposable providers. For a phone number, it returns validity, line type (mobile, landline or VoIP), original carrier, country and whether the number is reachable. A bulk endpoint accepts files of up to one million rows and calls a webhook when results are ready.
Email checks use DNS lookups and live SMTP handshakes that stop before any message is sent, with adaptive handling for providers that accept all addresses. Phone checks use numbering-plan data for more than 240 countries and carrier lookups. Results are cached for up to 30 days unless you request a fresh check. Median latency is about 300 ms per email, and a batch of 100,000 typically completes in under 20 minutes. Inputs are deleted after 30 days and are never added to Corbel's contact database.
11 fields as documented by Corbel B2B.
| Field | Type | Description | Example |
|---|---|---|---|
| input | string | Email address or phone number checked | — |
| input_type | string | email or phone | — |
| status | string | valid, invalid, accept_all or unknown | — |
| sub_status | string | Reason code, for example mailbox_full or disposable | — |
| is_disposable | boolean | Disposable email provider | — |
| is_role_account | boolean | Role address such as info@ or sales@ | — |
| mx_found | boolean | Domain has a mail exchanger record | — |
| line_type | string | mobile, landline or voip | — |
| carrier | string | Original carrier for phone numbers | — |
| country_code | string | Country of the phone number | — |
| checked_at | datetime | Time of the check | — |
Real rows from the provider's sample file. Personal data is masked before anything is shown.
| inputstring | input_typestring | statusstring | sub_statusstring | is_disposablestring | line_typestring |
|---|---|---|---|---|---|
| [email protected] | valid | role_account | false | null | |
| [email protected] | accept_all | null | false | null | |
| [email protected] | invalid | mailbox_not_found | false | null | |
| +1 555-0123 | phone | valid | null | false | mobile |
Prices in USD, as published by Corbel B2B
per 1,000 email checks, first 100,000 a month
per 1,000 email checks above 1 million a month
per 1,000 phone checks
Converted amounts use DataStoa display rates and are approximate. Corbel B2B quotes the final price, taxes and terms.
Request detailed pricingWorldwide coverage.
Time coverage: 2019 to present.
Provider-reported
Latency: Median 300 ms per email; 100,000-row batches in under 20 minutes
DataStoa has not audited these figures. Ask the provider how they are measured, or test them on a sample.
The licence is agreed directly between you and Corbel B2B. This summary is provider-reported; the linked terms prevail.
Not listed: AI / ML model training, AI retrieval and grounding, redistribution allowed, marketing and outreach, research use. Ask Corbel B2B if you need any of these.
Verified business contacts and decision makers with documented sourcing
Corbel B2B maintains business contact records for decision makers in North America and EMEA, re-verified on a rolling 90-day cycle. Every record carries its source type and last-verified date, and EMEA data ships with GDPR documentation.
Also available on: Snowflake Marketplace, AWS Data Exchange
What buyers say about Corbel B2B. Reviews cover the provider, not only this listing.
from 3 reviews
Emails were reliable, but direct dials for our Mexico and Canada lists connected less often than the US ones. Worth testing a sample per country before buying phone-enriched records in bulk.
Ana G., Growth lead, Logistics software start-up
The EMEA file came with a legitimate interests assessment, a description of how contacts are notified and a suppression process. Our DPO signed off in a week instead of the usual month. We still run our own opt-out handling, as you should.
Oliver S., Marketing operations manager, UK fintech scale-up
We bought about 40,000 North American contacts and the hard bounce rate stayed comfortably inside our email provider's limits. They replaced the bounced records without arguing. Titles and seniority were accurate enough to route straight into our sequences.
Jessica P., Head of sales development, HR software company